Ammonium Polyphosphate (APP-0M)
| HS Code | 421074 |
| Chemical Formula | (NH4)n+2PnO3n+1 |
| Appearance | White powder |
| Melting Point | Decomposes rather than melts |
| Solubility In Water | Poorly soluble |
| Ph Of Aqueous Solution | Near - neutral |
| Thermal Stability | Good thermal stability |
| Nitrogen Content | Typically 12 - 14% |
| Phosphorus Content | Typically 65 - 70% |
| Particle Size | Fine powder with small particle size |
| Flammability | Non - flammable, used as a flame retardant |
| Density | Around 1.8 - 2.3 g/cm³ |
As an accredited Ammonium Polyphosphate (APP-0M) factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Ammonium Polyphosphate (APP-0M) is packaged in industrial grade double-layer plastic woven bags with moisture-proof film inside. The bag mouth is tied with nylon rope and then sewn tightly; flame retardant grade is iron barrels, the barrels are painted with anti-rust paint, the lids are equipped with rubber gaskets, and the iron hoops are tightened to prevent moisture absorption and agglomeration. |
| Storage | Ammonium Polyphosphate (APP-0M) is stored in a dry and ventilated warehouse, with wooden pallets half a foot above the ground, away from water sources and strong alkali. Plastic woven bags are stacked together no more than five layers, and iron barrels are stacked no more than two layers. The warehouse needs to be ventilated frequently. In the rainy season, lime jars are placed to absorb moisture to prevent it from getting wet. |
| Shipping | Ammonium Polyphosphate (APP-0M) is transported in ordinary trucks, with wooden boards between bags to prevent squeezing. In rainy days, cover with oilcloth and be handled with care during loading and unloading. If the packaging is damaged, replace it with a new bag immediately to prevent the Ammonium Polyphosphate (APP-0M) from scattering. |
Competitive Ammonium Polyphosphate (APP-0M) prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please call us at +8615380400285 or mail to sales2@liwei-chem.com.
We will respond to you as soon as possible.
Tel: +8615380400285
Email: sales2@liwei-chem.com
Historical Development
In ancient times, fire prevention was mostly done by mud coating and water soaking. In modern times, plastics and rubbers have become popular, and the danger of flammability has increased. Craftsmen have sought high-efficiency flame retardants. Ammonium Polyphosphate (APP-0M) was born to meet the needs. When it was first made, the degree of polymerization was uneven and the flame retardant effect was weak. After half a century of improvement, it has become an essential product for polymer fire prevention.
Product Overview
Ammonium Polyphosphate (APP-0M) is a white powder, odorless and tasteless, insoluble in water, with good temperature resistance, excellent flame retardancy, good compatibility with resins, and is mostly used in plastics, coatings, and rubbers. When exposed to fire, it decomposes into a film to prevent the spread of fire.
Physical & Chemical Properties
Ammonium Polyphosphate (APP-0M) has a density greater than water, a fine texture, and a slippery feel when twisted by hand. The melting point is about 250℃. It does not melt when heated and decomposes, releasing ammonia and phosphoric acid. It is non-flammable and non-explosive, non-irritating to the skin, and has stable chemical properties.
Technical Specifications & Labeling
Ammonium Polyphosphate (APP-0M) is regulated by the following standards: degree of polymerization ≥1000, phosphorus content ≥30%, nitrogen content ≥14%. The full name of Ammonium Polyphosphate (APP-0M) must be written on the label, along with various indicators, flame retardant grade and storage method.
Preparation Method
Ammonium Polyphosphate (APP-0M) is usually prepared by using diammonium phosphate and urea as raw materials. They are put into a reactor in proportion and heated to above 200℃ for stirring and polymerization. After cooling, crushing and screening, Ammonium Polyphosphate (APP-0M) is obtained. The temperature is controlled to maintain the degree of polymerization.
Chemical Reactions & Modifications
Ammonium Polyphosphate (APP-0M) decomposes into polyphosphoric acid and ammonia when exposed to strong heat, reacts with metal oxides to form metal phosphate, forms an expanded carbon layer in the resin when exposed to fire, has the effect of heat insulation and flame retardancy, and is not easy to react with other substances at room temperature.
Synonyms & Product Names
Ammonium Polyphosphate (APP-0M) is also known as "ammonium polyphosphate (0M type)", but in commercial transactions and technical documents, the full name Ammonium Polyphosphate (APP-0M) must be used to indicate the model number accurately.
Safety & Operational Standards
When handling Ammonium Polyphosphate (APP-0M), you need to wear a dust mask to prevent the powder from entering your lungs. If it accidentally enters your eyes, rinse with clean water immediately; wash your hands after work, and isolate it from food raw materials during storage to prevent accidental mixing.
Application Area
Ammonium Polyphosphate (APP-0M) is mostly used for flame retardant plastics such as polyethylene and polypropylene, and is also used in fire retardant coatings and intumescent fire retardant seals. It is particularly widely used in buildings and home appliance housings to improve the flame retardant level of the material.
Research & Development
The Artisan Scholars are exploring the compounding effect of Ammonium Polyphosphate (APP-0M) and other flame retardants, studying how to improve its dispersibility in polymers, and improving the process to reduce production energy consumption and improve flame retardant efficiency.
Toxicity Research
Ammonium Polyphosphate (APP-0M) has extremely low toxicity and no irritating odor. Long-term contact is harmless to the human body, but it is necessary to prevent dust inhalation and basic protection is still required during operation.
Future Prospects
As fire protection standards become increasingly stringent, the demand for Ammonium Polyphosphate (APP-0M) will continue to grow, and its process will develop towards high polymerization degree and low water solubility, or expand to the field of fire protection of new energy materials to maximize its flame retardant function.
Where to Buy Ammonium Polyphosphate (APP-0M) in China?
As a trusted Ammonium Polyphosphate (APP-0M) manufacturer, we deliver:
Factory-Direct Value: Competitive pricing with no middleman markups, tailored for bulk orders and project-scale requirements.
Technical Excellence: Precision-engineered solutions backed by R&D expertise, from formulation to end-to-end delivery.
Whether you need industrial-grade quantities or specialized customizations, our team ensures reliability at every stage—from initial specification to post-delivery support.
As a leading Ammonium Polyphosphate (APP-0M) supplier, we deliver high-quality products across diverse grades to meet evolving needs, empowering global customers with safe, efficient, and compliant chemical solutions.
How to control the particle size when preparing Ammonium Polyphosphate (APP-0M)?
This material is made of phosphoric acid and ammonia. After the polymerization reaction, it needs to be controlled by a special granulation process. The molten material after polymerization is atomized by high-pressure air in a spray granulation tower. The droplets condense suddenly when encountering cold air to form particles with a diameter of 0.5-1 mm, which is Ammonium Polyphosphate (APP-0M). The wind speed and temperature need to be adjusted during granulation. The faster the wind speed, the finer the particles, while the slower the wind speed, the coarser the particles. The lower the temperature, the harder the particles, while the higher the temperature, the looser the particles. The process is like sieving sand and granulating. It needs to be precisely controlled to obtain uniform particles with good fluidity and easy mixing with other materials.
What are the advantages of Ammonium Polyphosphate (APP-0M) in fire retardant coatings?
This product is the core component of intumescent fire-retardant coatings, and the added amount accounts for 30% of the total coating. When exposed to fire, it can expand with resin and carbon source to form a honeycomb carbon layer 20 times thicker than the original coating. It has excellent thermal insulation performance and can keep the steel from exceeding the critical temperature within 120 minutes in a fire. Its particle size is moderate, and it has good compatibility with other components of the coating. It is not easy to break when grinding, and can be evenly dispersed, making the coating surface smooth and non-granular. The finer powder type APP settles slowly in the coating and is not easy to stratify during storage, so the shelf life of the coating is extended to 18 months.
How is Ammonium Polyphosphate (APP-0M) water-soluble?
This product is low in water solubility, with a solubility of only 0.5 g/100 ml of water at 25°C, so it is suitable for scenes that require water resistance. When it is immersed in water for 24 hours, the dissolution rate does not exceed 5%, so it is used in outdoor fire-retardant coatings, which are resistant to rain erosion, do not lose, and have a long-lasting flame retardant effect. Its aqueous solution is weakly acidic, with a pH value of about 5.5. It is weakly corrosive to metal substrates. When applied to the surface of steel, the anti-rust period is twice as long as that of water-soluble APP. Due to its low water solubility, it is not easy to agglomerate when stored in a humid environment, and it does not need to be frequently turned over, making it easy to manage.
What is the synergistic effect of Ammonium Polyphosphate (APP-0M) with other flame retardants?
When mixed with pentaerythritol in a ratio of 3:1 and used in polyurethane foam, the flame retardant level can reach UL94 V-0, the carbon layer is dense, and the heat insulation is good. When used in combination with melamine, it can promote the expansion reaction and increase the height of the carbon layer by 50%, which is suitable for thick-coated fire-retardant coatings. When mixed with aluminum hydroxide, it can reduce the cost of coatings, while reducing the smoke density during combustion and minimizing the toxicity level of smoke. Its synergistic effect is like the cooperation of many craftsmen, each showing their strengths, making the comprehensive performance of fire-retardant coatings better.
How to prevent Ammonium Polyphosphate (APP-0M) from agglomerating during storage?
This product needs to be packed in multi-layer kraft paper bags lined with plastic film, 25 kg per bag, and the bag mouth should be tied tightly and covered with woven bags. Store in a ventilated and dry warehouse, with wooden boards on the ground, so that the materials are 30 cm above the ground, and the stack height should not exceed 8 layers to prevent the bottom layer from being compressed and agglomerated. In the rainy season, quicklime should be placed in the corner of the warehouse to absorb moisture, and the bottom layer of materials should be turned over once a month. If there is slight agglomeration, you can tap the bag to loosen the particles. If there is severe agglomeration, it needs to be crushed. However, it does not affect its flame retardant properties, so storage management is relatively simple.
